美国零售牛奶中较大的变量:不同零售店的后续研究
Janet M Roseland1, Katherine M Phillips2, Bryan T Vinyard3
1Methods and Application of Food Composition Laboratory, Agricultural Research Service, U.S. Department of Agriculture, Beltsville, MD 20705, USA.
Nutrients
|July 29, 2023
概括
零售牛奶含量在美国各地和随着时间的推移而有很大差异. 这种变化意味着牛奶中的摄入量可能在人口水平上被不准确地估计.
科学领域:
- 营养科学 营养科学
- 食品化学 食品化学
背景情况:
- 之前的研究显示,美国各地零售牛奶中含量存在显著的变化.
- 之前的采样设计不允许特定位置的差异检测.
研究的目的:
- 为了评估美国零售牛奶中的度,随着时间的推移和不同地理位置.
- 了解地方内和地方之间水平的变化程度.
主要方法:
- 在一年内,每两个月从美国十四个地点收集2%脂肪的牛奶样本.
- 用质量控制材料重复样本分析,以确保准确性和精度.
主要成果:
- 总体平均度为82.5 (7.0) 微克/240毫升,与之前的国家发现相比.
- 在单个样本中观察到含量 (27.9-282 μg/240 mL) 的广泛范围.
- 在不同地点之间发现了平均度的显著差异,与全国平均水平相比,每份从-47μg到+37μg的变化.
结论:
- 零售牛奶中的含量表现出相当大的地理和时间变化.
- 特定地点的度可能与全国平均值有很大差异.
- 仅依靠国家平均值可能会导致某些人群过度或低估牛奶中的摄入量.
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